William joseph still



(No Model.) 7

W. J. STILL. STORAGE BATTERY.

N0. 589,0 42. Patented Aug. 31, 1897.

' which My invention relatesto improvements in; storage or secondarybatteries; and the :obj ecti of the invention is to design a simple,com-; pact, and durable'form of electrode in which the oxid-may be heldin such a manner that; it may be thoroughly permeated with the acidandyet maybe capable of expansion and,con-- traction without shedding theoxid, and it consists, essentially, of formingth'e electrodesspiral'strip, the,

wires STATES:

\VILLIAM JOSEPH STILL, OF TORONTO, CANADA.

STO RAG E BATTERY.

SPECIFICATION forming part of Letters lE'atent No. 589,042, dated August31, 1897.

Application filed February 10,1896. Serial No. 578,769. on; HiodelJ T0at whom it may concern:

Be it known that I, WILLIAM-JosEPH STILL, electrician, of the city ofToronto, county of York,- in the Province of Ontario, Canada, haveinvented certain new and useful Improvements in StorageBatteries, of thefollowing isfalspecification.

preferably of a rectangular oxid beingplaced between the convolutions ofthe spiraland a post being provided for; supporting thes'pira'l, thelead from the electrode preferably leading off from, the center of thespiral and the electrode and connec-f otherwise constructed, as herein-,

tions being 4 I after more partic'ularly explained.

Figure 1 is a perspective View showing two? cells with the side and topof one broken away to exhibit the construction of the electrodes 2 isanenlarged detail of an electrode, the central-post .beingintermediatelybroken away, aswell as the spirallysformedplate,'a portion of the oxidbeand their connections. Fig.

ing also removed.

dicate corresponding A is the central or lar and is providedwith groovescnthroughout the major portionjoi its-length.

B is'a' cylindrical top ormed with the post. 1

D is a rectangular spiral of sheet-lead which nected near the center tothe spiral and extends upwardly throughone 0f the grooves a to the 'top'of the spiral, thus forming a lead from the electrode.

- F is an insulating-plate provided with holes j 1 ;sion and helpcontraction.- In the drawings like'letters of reference in-' post ofeach electrode, which is made preferably rectangu-l I f, with wingrecesses f through which extend .th-e'bott oms do'f the posts A or theelectrode, which areredu'cedtin diameter to fit into the hole thereofj Ict ,isapin which is ,passed'through the post A above the bottom shoulderand designed'to separate the bottom of the spiral from the plateF.

a is a pin'whichpasses through the post A below the plate F .anddesigned to hold the bottom of the post securely in the plate. G is thetopins-ulating-plate, which rests upon squareshouldersA, formed at thebottom of the cylindrical top-:B. A pin a extends through the;to'p .B'of each electrode across. the slit O, and the-top plate Gis made withslots. grunning one way and slots g run- ,ning at'right angles thereto.It will of course be understood thatthe center of each slot 9 g iscircular, .so as. to receive the cylindrical top B of'the post. The pinsa, it will thus be. seen, servetoahold down the top plate upon theshouldersAC; f

H is an elastic looped band which is passed through the-stop slit!) anddown alongside of the electrode through holes f in the bottom plate F.Pins .h.arelp.as'sed through the looped elastic bands, so as to holdthem securely around the electrode.

The'bands' serve to pressfupon the. oxid in the electrodejand yet permitof a ready expan- The elastic bands .11 arepasseddown;the :tworsides ofthe elec- -trode,'asdescribed, andy-on each adjacent jelectro'de'thebands pass down on different sides, so that they form a means ofinsulating the electrodes from each other in case of jar- I ring. Thetop of the band, which extends on the ,post'A, and O is a slit made inthe top longitudinally across the top of the spiral, is .on a line withthe slots 9 and g inthe'plate G, and these slots are longer than thewidth of the electrode. As the, combined electrodes with the top andbottom plates G and F can be removed simultaneously, being connected:together, it will be seen that if any band becomes broken it may bereplaced when, out .of the cell by simply passing the bands aroundthrough the slits and slots to the bottomplate F without removing anyone electrode to do so.

The leads E of, we will say, the positive electrodes are connected tothe binding-post I, while the leads of the negative electrode areconnected to the binding-post J. The lower portions I and J of the postsare cylindrical and made of lead and extend through the top plate K,which is of course sealed all around. The tops of the posts I and J aremade with a tinned stem and spherical head. The top plate K rests uponthe tops of the posts A. The negative bindingpost J is connected to thepositive bindingpost I of the next cell by the plates L L, havingareshaped grooves l 1 made in them.

M is a thumb-screw by which the spherical heads of the posts I and J areheld securely in the grooves I Z, so as to form a perfect contact.

By making the heads of the binding-posts spherical and forming aconnection between them, as described, by the plates L with grooves Iainenabled to provide for the perfect connection between the cells.

As it is very difficult in practice to get the electrodes of the sameheight, the benefit of the construction above described will be readilyunderstood.

\Vhat I claim as my invention is- 1. In a storage battery, an electrodecom prising a rectangular contin uous hollow spiral of flat stripsheet-lead in flexible form with both edges free and an interposedhollow spiral of active material exposed at the inside and outside and asupporting-post for the electrode extending up within the spiral andforming a guide for the free lengthwise movement of the spiral, as andfor the purpose specified.

2. In astorage battery an electrode comprising a rectangular hollowspiral of flat strip sheet-lead and an interposed hollow spiral ofactive material, a rectangular supportingpost for the electrodeextending up through the spiral and longitudinal grooves in each side ofthe post as and for the purpose speciiied.

3. In a storage battery an electrode comprising a rectangular hollowspiral of fiat strip sheet-lead and an interposed hollow spiral ofactive material, a supporting-postfor the electrode extending up withinthe spiral and a lead from the center of the lead spiral as and for thepurpose specified.

i. In a storage battery an electrode comprising a rectangular hollowspiral of flat strip sheet-lead and an interposed hollow spiral ofactive material, a rectangular supportingpost for the electrodeextending up through the spiral, longitudinal grooves in each side ofthe post and a lead from the center edge of the spiral extending upthrough one of the grooves through the central opening of the spiral asand for the purpose specified.

5. The combination with the rectangular hollow spiral of flat stripsheet-lead and the hollow spiral of active material filling the spacesbetween the oonvolutions, of the central post having a top slit and theelastic band passing through the slit and from end to end of theelectrode, the lower end of the band being suitably fastened,substantiallyas described.

6. The combination with the rectangular electrodes formed of a flatrectangular spiral with an interposed spiral of active material andcentral post with cylindrical top and slits in the tops of such posts,of the top and bottom insulating-plates oppositely-formed slots for eachalternate electrode in the top plate and circular openings in the centerof such slots to receive the cylindrical heads of the posts and anelastic band for holding the plates together having the top on alinewith the slots as and for the purpose specified.

7. The combination with the spirallyformed electrodes having the reducedtop and bottom ends forming shoulders, of the top and bottominsulating-plates into which such red uced ends fit as and for thepurpose specified.

8. The combination with the spirallyformed electrodes having the reducedtop and bottom ends forming shoulders, of the top and bottom plates andthe winged holes in the bottom plate to receive the correspondingreduced ends as and for the purpose specified.

9. The combination with the spirallyformed electrodes having the reducedtop and bottom ends forming shoulders, of the top and bottom plates andthe pins extending through the bottoms of the posts above the shoulderand separating the bottoms of the electrodes from the insulating-platesas and for the purpose specified.

10. The combination with the spirallyform ed electrodes having thereduced top and bottom ends forming shoulders, of the top and bottomplates and pins extending through the reduced ends to bind the posts ofthe electrodes to the top and bottom plates as and for the purposespecified.

11. The combination with the spirallyformed electrodes having thereduced top and bottom ends forming shoulders, of the top and bottomplates, slots in the same through which the leads eXtend,binding-poststo which the leads are connected, and the top sealingplate resting onthe tops of the posts and having openings through which thebinding-posts extend as and for the purpose specified.

12. In a storage battery the combination with the electrodes and leadstherefrom and binding-posts to which the leads for each cell areconnected having stems with spherical heads, of a pair ofconnecting-plates for the cellshaving arc-shaped grooves and clampingmeans for holding the spherical heads in the grooves as and for thepurpose specified.

- WILLIAM JOSEPH STILL.

Witnesses:

B. BOYD, II. DENNISON.

